What type of hardware is used to prevent gears and pulleys from spinning on a shaft?
a. A key
b. A cotter pin
c. A retainer ring
d. Blind rivet
a
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Refer to Exercise 31. Assume the first card is not replaced before the second card is drawn.
a. Find the joint probability mass function of X and Y.
b. Find the marginal probability mass functions 
(x) and 
(y).
c. Find 
and 
.
d. Find 
.
e. Find Cov(X, Y).
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Solve the following equation for the unknown variable: 
.
Fill in the blank(s) with the appropriate word(s).
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A building measures 24' × 36'. What does the diagonal of the building measure in feet?
A) 37.51' B) 48.01' C) 44.76' D) 43.27'
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The most common material used on the surface of contacts is ____________________.
Fill in the blank(s) with the appropriate word(s).
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